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What do you reply when an aeronautical station initiates a SELCAL transmission?
  • A
    SELCAL RECEIVED
  • B
    SELCAL OKAY
  • C
    LISTENING
  • D
    GO AHEAD

Refer to figure.

SELCAL is abbreviated for Selective Calling System and it is used in international aviation to alert flight crews of transmission directed to them as they fly transoceanic routes. SECAL operates on HF or VHF frequency bands.

An individual aircrafts owns its unique SELCAL code which is used by the controller to address the SELCAL on board of the aircraft. The code is converted into four designated audio tones, then it is broadcast and every aircraft, which has a SELCAL system, receives it. The decoding system reads the tones and triggers a warning for the flight crew if it recognizes its own code.

Relating phraseology:

  • When an aeronautical station initiates a call by SELCAL, the aircraft replies with its radio call sign, followed by the phrase “GO AHEAD”.
  • Request SELCAL check for XX-XXX (SELCAL code of the aircraft)
  • SELCAL check is coming uo for XX-XXX

  • SELCAL OK or NEGATIVE SELCAL

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